(19)

(11)

EP 2 517 509 A1

(12)

(43) Date of publication: 31.10.2012 Bulletin 2012/44 (21) Application number: 09852417.6 (22) Date of filing: 23.12.2009

(51) International Patent Classification (IPC):  H04W 56/00(2009.01) (86) International application number: PCT/CN2009/001534 (87) International publication number: WO 2011/075867 (30.06.2011 Gazette 2011/26)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (71) Applicant: Telefonaktiebolaget L M Ericsson (PUBL) 164 83 Stockholm (SE)	(72) Inventor: LIAO, Jingyi Solna 170 66 (SE) (74) Representative: Rees, Simon John Lewis  Haseltine Lake LLP 120 Redcliff Street Bristol, Avon BS1 6HU Bristol, Avon BS1 6HU (GB)